Impactor



Nov. 19, 1946. E mad, 2,411,302

- IIPAG'IOB I Filed Kay 30; 1942 2 Sheets-Sheet 1 'iumvmxs James E 6km -5170RNEKS I Nov. 19, 1946 J. E. STINE EI'AL IIPAGTOR 2 Sheets-Sheet 2 Filed nag so, 1942 nvmvroxs .fames L: 5161! Barium ATTORIVEYS Patented Nov. 19, 1946 I James E. Stine, Aidan, and George W. Borton,

Philadelphia, Pa., assignors to Pennsylvania Crusher Company, Philadelphia, Pa., a corporation-of New York 7 Application May 30, 1942, SerialNoQ 445,116

This invention relates to crushers and particulglycio those fracturing pieces of material by The object of the invention is to combinewith a thorough impact reduction a further reduction by a group of several bars on an arc approaching the beater circle to give an additional breakdown of the material. 1

Other objects of the invention, particularly in the construction and cooperation of the parts and their combination with a final impact plate at the discharge, will appear from the following description taken in connection with the accompanying drawings, in which Fig. 1 is a vertical sectional view of a crushing apparatus embodying the invention;

Fig. 2 is a horizontal sectional view taken on the line 2-2 of Fig. 1;

II and stirrup heaters l2. Upper breaker blocks 14 protect the cover and overlap with the main breaker or impact blocks or anvils l5, four of which are shown as mounted on each side in an impact block frame l6v formed by end pieces 11 with the cross tie shafts l8. The middle tie shaft 18 is linked at 19 to the pin 20 of an im pact block adjusting screw 2| adjusted by the hollow nut and hand wheel 22 journaled in the bearing 23 of the casing offset 21.

The lower portions of the impact block frame 11 are extended as indicated at 25 to provide anchorages for a cast unit 26 comprising a series of bars 21 joined together at their ends as indicated at 28, these end parts 28 being provided with fastening lugs 29. having bolt holes 30 for the bolts 3| attaching the unit to the lower portions 25 of the impact block frames 16. The bar shape 21 is typical and may be altered to meet varying conditions.

Protective baflle plates 33 are provided on each side and a final central breaker block 36 of inverted V formation is hung on the cross shaft 31. or held by other means.

The material entering at 9 moves squarely into 1 Claim. (01. 241-86) R 2 the path of the heaters and is impacted back and forth between the heaters and the impact blocks IS on the side of the machine toward which the hammers are moving at the top. Then the fractured pieces from these repeated impacts 7 "are driven against the bars 21 of the unit 25,

these bars being smaller than the impact blocks 15 and positioned on an are approaching the beater circle so as further to break downand reduce the larger fractured particles, The heaters l2 and the bars 21 particularly cooperate to fracture to smaller size any oversized pieces delivered from the previous "impacts. The spaces 38 between bars 21 are generously large for passing of crushed material and preferably widen out radially so as to avoid any retention or jamming of material between the bars. These bars form a wash board effect which accomplishes the final reduction within a very short space, shorter than the space alloted to the initial fracturing by impact.

Preferably the group of bars 21 is mounted on the impact block frame carrying the impact blocks 15 so as to be adjusted therewith, but independent adjustment of the'bar group unit 26 may be provided. As indicated in Fig. 3, strengthening webs 40 may be provided at the central portion of the group in the spaces 38. Bar group 21 (Fig.v 3) may be perforate or imperforate with corrugations as desired.

In the bar group unit shown, the end portions :8 lie snugly within the extensions 25 oi. the impact block frame pieces l1 andthe rear surfaces' of these ends rest against the shoulders 41 of the thickened end portions 42 of the frames, as shown in Figs. 2, 3 and 4. i p The fractured'n' aterial finally discharged from the breaker bars' I5, 21 is then projected against the surface of the lower breaker block or kickoff plate" 36 placed to intercept the material leaving the impactblocks at high speed. This kick-v off platef36 protects the foundation from the impact of the discharged material and also utilizes the energy of the discharged particles to effect a final reducing action. This breaker block 36 may the pressure of the impacting material, or it may be provided with a simple locking lever on the outside of the machine clamped in different ad- Justments to regulate and maintain the desired angularity of the plate.

The machine shown is of the reversible type generally symmetrical pactly attained within 180 with an ample discharge opening between the bar group unit 26 and the kick-E plate 36. The impact fracture by the beaters and impact blocks l puts the matea series of spaced rectangular impact members extending in an are from said upper breaker surfaces to the level of the axis of the heater and having their relatively long flat inner surfaces in planes inclined forward at an acute angle with the beater circle and adapted to cooperate with said beaters to fracture the material by impact back and forth between the heaters and said members, an impact block frame carrying said impact blocks and pivoted at its upper end and adjustable to vary the distance of the frame from the beater rial into condition so that the next reduction is attained within the several bars carried by the unit 28 in much less space than that occupied by the initial impact fracture stage. The result is a very effective reduction of the oversize material within a restricted space and with economy in the overall xpenditure for maintenance and power, the material being broken into substantially properly sized pieces with a minimum development of fines.

We claim: I

In a crusher having a rotor carrying beat: ers in a casing with an upper entrance opening and a dischargeopening opposite and below said entrance opening, the combination with upper breaker'suriaces around the entrance opening, of

circle of the rotor around th pivot at said upper end of the framefand a group of relatively small closely spaced bars following said impact blocks and mounted on said frame and having side surfaces nearly radial to the axis of the beater circle and extending from said impact members in a screen fracture and said stages of reduction andthe discharge are compactly attained within JAMES E. STINE.

GEORGE W. BORTONQ 

